The graph shows the percentage of a country's adults on weight-loss diets. 16 13 Percentage on Diets (96) 0- 10 20 Years after 1987 a. Use the two points whose coordinates are shown to find the point-slope form of the equation of the line that models the percentage of adults on diets, y, x years after 1987. (Simplify your answer. Type your answer in point-slope form. Use integers or fractions for any numbers in the equation.)